Hybrid RANS/PDF simulations of the adelaide jet-in-hot-coflow burner using 3D FGM tabulated chemistry

Ashoke De, Bharat Bhatia, Gerasimos Sarras, Dirk Roekaerts

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

A probability density function (PDF) based combustion modeling approach for RANS is used in the simulation of a jet issuing into a hot and diluted coflow. A tabulated chemistry based model, i.e. Flamelet Generated Manifold (FGM), is adopted in the PDF method. The manifolds are constructed using igniting counter-flow diffusion flamelets with different coflow composition. To handle the inhomogeneity of the coflow and the entrainment of the ambient air, a second mixture fraction is defined to quantify the mixing of a representative coflow composition with the ambient air. The chemistry is then parameterized as a function of two mixture fractions and a reaction progress variable. Two flames, namely HM1 and HM3, having different oxygen mass concentration in the hot coflow, 3% and 9% O2 respectively, have been simulated for Reynolds number (Re) =10000. The mean oxygen concentration and temperature profiles are well predicted showing the capability of the tabulated chemistry. Profiles of mean mixture fraction and major species are also accurately captured by the model.

Original languageEnglish
Title of host publicationProceedings of the 5th International Conference on Computational Methods for Thermal Problems (THERMACOMP 2018)
EditorsN. Massarotti, P. Nithiarasu, P. Dutta, C. Ranganayakulu
Place of PublicationDalian, China
PublisherDalian University of Technology
Pages164-167
Publication statusPublished - 2018
EventTHERMACOMP 2018: 5th International Conference on Computational Methods for Thermal Problems - Bengaluru, India
Duration: 9 Jul 201811 Jul 2018

Conference

ConferenceTHERMACOMP 2018: 5th International Conference on Computational Methods for Thermal Problems
CountryIndia
CityBengaluru
Period9/07/1811/07/18

Keywords

  • FGM
  • Hybrid RANS/PDF
  • Jet-in-Hot-Coflow

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